Visual Studio poor performance issue

Over the last two weeks my Visual Studio has been behaving strangely. Launching a simple console application in debug mode would take about 5 minutes for it to come up. Same thing happened when launching other projects in the solution in debug mode.

Today I cleaned up my Visual Studio configuration, rebooted my PC and the debugger launches instantly as expected. In case any of you are experiencing a similar issue, you can clean your visual studio by performing the following:

Tools -> Import and Export Settings…
Select “Reset all settings”, and click next.
Select “No, just reset settings”, and click next.
Choose your default collection of settings (Visual C# Development Settings)
Click Finish.

HRESULT: 0x80070057 (E_INVALIDARG)

Very annoying problem for a good while today. I happened to be reverting my code back to a previous version of the repository on SVN. We needed to roll back some changes, and to my surprise after going back to the previous version I wasn't able to build the solution anymore, showing me a weird error:
"Could not load file or assembly … The parameter is incorrect … HRESULT: 0x80070057 (E_INVALIDARG)".

How to solve Http 401 error for Http Put and Delete with WCF Rest

With the popularity of WCF Rest services, it is now a bit more common to issue HTTP PUT and HTTP DELETE requests. I don't remember using those verbs before in my career. Whenever I needed to delete something or update something, I would use HTTP POST and then handle the data in the back end. But times have changed, and with WCF Rest embracing the HTTP protocol, you are more likely to work with those two verbs more often.